9657881 has 2 divisors, whose sum is σ = 9657882. Its totient is φ = 9657880.

The previous prime is 9657863. The next prime is 9657937. The reversal of 9657881 is 1887569.

It is a happy number.

9657881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5331481 + 4326400 = 2309^2 + 2080^2 .

It is an emirp because it is prime and its reverse (1887569) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9657881 is a prime.

It is a super-2 number, since 2×9657881² = 186549330820322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9657811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4828940 + 4828941.

It is an arithmetic number, because the mean of its divisors is an integer number (4828941).

Almost surely, 2^9657881 is an apocalyptic number.

It is an amenable number.

9657881 is a deficient number, since it is larger than the sum of its proper divisors (1).

9657881 is an equidigital number, since it uses as much as digits as its factorization.

9657881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 44.

The square root of 9657881 is about 3107.7131463505. The cubic root of 9657881 is about 212.9579953465.

The spelling of 9657881 in words is "nine million, six hundred fifty-seven thousand, eight hundred eighty-one".